Bridge-t oscillator circuit with gain control

• US 3,317,854 A
• Filed: 05/10/1966
• Issued: 05/02/1967
• Est. Priority Date: 05/10/1966
• Status: Expired due to Term

• Current Assignee: Erland W. Rudy, John Liska
• Original Assignee: Erland W. Rudy, John Liska
• Inventors: Liska, John, Rudy, Erland W.
• Application Number:
  US04/554,265
• Time in Patent Office: 357 Days
• US Class Current: 331/110
• CPC Class Codes: H03B 2200/0066 Amplitude or AM detection
• CPC Class Codes: H03B 5/24 active element in amplifier being semiconductor device H03B5/26 takes precedence

Claims

3. IN AN OSCILLATOR CIRCUIT COMPRISING A POWER SOURCE AND A FIRST AMPLIFYING DEVICE CONNECTED TO SAID POWER SOURCE;

A SECOND AMPLIFYING DEVICE HAVING A FIRST ELECTRODE CONNECTED TO SAID POWER SOURCE, A SECOND ELECTRODE CONNECTED TO RECEIVE THE OUTPUT OF SAID FIRST AMPLIFYING DEVICE, AND A THIRD ELECTRODE;

RESISTANCE MEANS CONNECTED BETWEEN SAID THIRD ELECTRODE AND A COMMON VOLTAGE REFERENCE POINT;

A RESONANT CIRCUIT OF BRIDGE-T CONFIGURATION CONNECTED TO SAID RESISTANCE MEANS AND TO THE INPUT OF SAID FIRST AMPLIFYING DEVICE TO PROVIDE A NEGATIVE FEEDBACK LOOP FOR SAID OSCILLATOR;

MEANS INCLUDING PARALLEL-CONNECTED CAPACITANCE AND RESISTANCE DEVICES CONNECTED TO SAID RESISTANCE MEANS AND TO SAID FIRST AMPLIFYING DEVICE TO PROVIDE A POSITIVE FEEDBACK SIGNAL TO SAID FIRST AMPLIFYING DEVICE;

AND